Stephen Bonnar and Dave Herman, following their participation at UFC 153 in Brazil, on Friday were the latest athletes snagged by drug testing. Bonnar tested positive for steroids, while Herman popped hot for marijuana.

When the UFC makes the trek down to Brazil, as in many other locations outside of the U.S. and Canada, there is often no athletic commission to oversee the event or drug testing. In such cases, the UFC regulates itself under the eye of former Nevada Athletic Commission executive director Marc Ratner, and contracts a third party, accredited drug testing company.

Bonnar and Herman tested positive as a result of such procedures, and the UFC on Saturday issued the following statement that includes an admission of guilt by Bonnar and Herman:

“Stephan Bonnar and Dave Herman tested positive for banned substances following their bouts at UFC 153. The UFC has a strict, consistent policy against the use of any illegal and/or performance-enhancing drugs, stimulants or masking agents. Both fighters have admitted taking the banned substances and have orally agreed to suspensions. Once the suspensions have been reduced to written agreements, the results of their tests and the agreed upon suspensions will be sent to the Association of Boxing Commissions official record-keeper so other jurisdictions will be on notice.”

Stephan Bonnar retired following the bout, while Dave Herman has lost his last three fights for the UFC.